Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc0ea8d5ec88320…

MALICIOUS

PDF

82.5 KB Created: 2021-03-14 18:20:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 735a5afeeee42df20f44afd4e3789e20 SHA-1: be54935cd33331864b45e4d55c8e49c0e8f28c92 SHA-256: ccc0ea8d5ec8832062c4336ffc0c6f197b60800bd767560b8a4d25c0cdcbe549
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a link farm, with many pointing to disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO poisoning. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/wix?keyword=marsh+cave+b3+map PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367922/normal_5fedf5d6c1d83.pdfIn PDF document text
    • http://springwin.space/tobelemebavolo14keb.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/6395815460.pdfIn PDF document text
    • https://sifobidegi.weebly.com/uploads/1/3/0/8/130874382/xezozuxusodulibupus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_6041bcec59561.pdfIn PDF document text
    • http://aov.one/how_to_apply_adhesive_vinyl_to_woodhoxhn.pdfIn PDF document text
    • https://lapedegino.weebly.com/uploads/1/3/4/6/134689006/bulimoxotafe.pdfIn PDF document text
    • https://kemebawe.weebly.com/uploads/1/3/5/3/135313751/wasowagojufujiwesok.pdfIn PDF document text
    • https://zulitaxovali.weebly.com/uploads/1/3/5/3/135351491/sokegubivex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_5fea37eea7df4.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/fhcjjHF/xogitivadamozurud.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/balegizelupegegaxij.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/corsair_commander_pro_setup.pdfIn PDF document text
    • https://cdn.sqhk.co/vefomatakin/ehbNy2T/wozobapobuguwowebulab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_5fd9069f4ea94.pdfIn PDF document text
    • https://nedatukurugajim.weebly.com/uploads/1/3/6/0/136022322/femawu.pdfIn PDF document text
    • https://texatejoluneb.weebly.com/uploads/1/3/5/3/135318687/9975187.pdfIn PDF document text
    • https://bekarofadu.weebly.com/uploads/1/3/4/3/134346179/4bff8e055b.pdfIn PDF document text
    • https://kajimawujejava.weebly.com/uploads/1/3/5/3/135348493/josenipaviz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namakanexir.atwebpages.com/dust_in_the_wind_partitura_guitarra.pdfIn PDF document text
    • http://jokosen.atwebpages.com/mi_gente_translation_english_spanish_dictionary_reverso.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 5448 bytes
SHA-256: 711b7dc0f2c446972bc75198e8f3a4498bfd5bed75209f60f6d616932ad80db0
font_01_sfnt_off00010638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 5512 bytes
SHA-256: 2b928fef7cdb3bc44ac0285d3cbdd143aee5a2f5f5b5dfda1128e0b5cd74fc23
font_02_sfnt_off000118dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DC 10428 bytes
SHA-256: 988907ff1a5cc48dec131d12e7176d9f52a9304ec73dd52ec1cddd8107bfc132